Pentagon officials are expecting North Korea to test fire an intermediate-range missile Friday morning, CBS News national security correspondent David Martin reports.

The missile in question is a Musadan, which is road mobile and has enough range to reach the Aleutians and Guam. It’s never been tested before, so this is another step toward being able to threaten the United States with a nuclear weapon.

Friday, April 15 marks the birthday of Kim Il-sung, the “Great Leader” who rule North Korea from 1948 until his death in 1994.

On Saturday, North Korea said it had successfully tested a new intercontinental ballistic rocket engine that will give it the ability to stage nuclear strikes on the U.S.

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Image courtesy of Reuters/KCNA